1. tube expander can save up to 2% of copper 2. 4- ... effort in research & development, we successfully developed a shrinkless tube expander, it can save up to 2% of copper. For ... instant, a normal expander cause copper shrink 3%, while shrink less expender only shrinks ... machine20set20set20set20setpower of motor18.5kw22kw22kw30kw Air-condition Heat-exchanger Shrinkless Expander